For 600A Mercury Gen I series controls and engines. The TfXtreme Hi-Performance Cable starts with a 1x13 wire core for strength and flexibility, even with heavy loads, next a nylon core coating for smooth action and long life. Over that a long-wearing HDPE liner; ultra smooth and lubed for life. Over that, .033" oil tempered lay wires for superior strength and performance, and finally the outer coat is a .34" super tough HDPE jacket for ultimate protection against UV, chemicals and weather. These cables may require connection kits on some engines. (Use regular Teleflex connection kits).